[Gmsh] Showing displacement shape of 4-node line element? (for beam element)

[Christophe Geuzaine]

Hi Mohamed - Gmsh uses an adaptive scheme to visualize high-order elements: select "Adapt visualization grid" in the view options, and choose the appropriate refinement level.


On 11 Dec 2012, at 07:47, Mohamed Moussa <mohamed.moussa89 at gmail.com> wrote:

> Hi there,
> 
> I am writing an FEA solver for fun (and education) and I am using gmsh
> as my post-processor.
> 
> Im trying to visualize my beam elements using a 4-node line element in
> gmsh. It seems the displacements for the inner nodes are not being
> shown in the post-processing view.
> 
> Below is a very simple MSH file that I wrote to test. The mesh
> consists of one 4-node line with no displacements on either end. The
> middle two nodes have a displacement of -0.1. However, I cant see any
> displacement shape in gmsh. Any ideas? I have set vector display =
> 'displacement' in post-processing options so its not that.
> 
> $MeshFormat
> 2.2 0 8
> $EndMeshFormat
> $Nodes
> 4
> 1 0 0 0
> 2 1 0 0
> 3 0.33 0 0
> 4 0.66 0 0
> $EndNodes
> $Elements
> 1
> 1 26 0 1 2 3 4
> $EndElements
> $NodeData
> 1
> "Displacement"
> 1
> 0.0
> 3
> 0
> 3
> 4
> 1 0.0 0.0 0.0
> 2 0.0 0.0 0.0
> 3 0.0 -0.1 0.0
> 4 0.0 -0.1 0.0
> $EndNodeData
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine